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VESPR Shapes
Question | Answer |
---|---|
AX2 | linear |
AX3 | trigonal planar |
AX4 | tetrahedral |
AX5 | trigonal bipyramidal |
AX6 | octahedral |
A stands for | central atom |
X stands for | surrounding atom w bond |
E stands for | lone pairs |
Higher bond orders... | -have higher electron densities, -causing greater electron repulsion, -requiring more space. -(1 is <120 on trig planar) |
Lone pairs... | -are less constrained -so they take up even more space -(1 is 95 on trig planar) |
Linear ideal angle | 180 |
Trigonal Planar ideal angle | 120 |
Bent Trigonal Planar angle | <120 |
Tetrahedral ideal angle | 109.5 |
Trigonal Pyramidal | ~107.3 |
Bent Tetrahedral | ~104.5 |
How many bonds does hydrogen have? | Always one |
How many bonds do halogens have? | Normally one |
How many bonds does oxygen have? | Almost always 2, sometimes 1. |
How many bonds does nitrogen have? | Normally 3, sometimes 4. |
How many bonds does carbon have? | Normally 4, besides CO. |